Magnetic head drive apparatus which uses a common current source

Details Magnetic head drive apparatus which uses a common current source Magnetic head drive apparatus which uses a common current source

1986-11-04

1988-09-06

Cardillo, Raymond F.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Signal switching

360 63, 360 66, 360 46, 360 68, G11B 1512, G11B 5024, G11B 5265

Patent

active

047697245

ABSTRACT:
In a magnetic head drive apparatus of this invention, a coil of an erasing head is connected to a center point of the coils of a read/write head, and a drive current from a constant-current source is alternately supplied to both terminals of the coil of the read/write head, according to the polarity of the write data. When the read/write head is driven to write data in a magnetic recording medium, the erasing head and the read/write head are driven at an identical timing. In this case, the drive currents for the read/write head and the erasing head are supplied from a single-current source. For this reason, separate constant-current sources are not necessary for the read/write head and the erasing head.

REFERENCES:
patent: 4553179 (1985-11-01), Inami et al.
patent: 4611253 (1986-09-01), Kamei et al.
patent: 4651235 (1987-03-01), Morita et al.

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